Size Please consider the height of your sig-pic. If your sig-pic consistently takes up more vertical space than your message, you can be pretty sure it's waaaaay too big. A good sig-pic is no higher than, say, 6 lines of text. The width isn't all too important but if you keep it below 750 pixels wide, then nobody will have to scroll horizontally. Not everybody is running @ 1280x1024 or higher resolutions.